汽车工程

汽车工程 ›› 2018, Vol. 40 ›› Issue (12): 1447-1453.doi: 10.19562/j.chinasae.qcgc.2018.012.010

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车辆蠕行控制策略研究*

马彪1,2, 昌和1, 李和言1,2, 李慧珠1, 朱礼安3   

  1. 1.北京理工大学机械与车辆学院,北京 100081;
    2.北京电动车辆协同创新中心,北京 100081;
    3.江麓机电集团公司,湘潭 411100
  • 收稿日期:2017-10-30 出版日期:2018-12-25 发布日期:2018-12-25
  • 通讯作者: 马彪,教授,E-mail:mabiao@bit.edu.cn
  • 基金资助:
    国家自然科学基金(51575042,51775045)资助

A Study on Control Strategy of Vehicle in Creep

Ma Biao1,2, Chang He1, Li Heyan1,2, Li Huizhu1, Zhu Li'an3   

  1. 1.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081;
    2.Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081;
    3.Norinco Group Jianglu Machinery and Electronics Group Company, Xiangtan 411100
  • Received:2017-10-30 Online:2018-12-25 Published:2018-12-25

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摘要： 针对车辆蠕行过程中车速波动及摩擦副易烧蚀问题,本文中对干式摩擦副的摩擦特性进行了分析,确定了其热安全边界;建立了车辆传动系统模型,考虑蠕行起步及蠕行过程中离合器摩擦副摩擦因数变化,以3km/h为蠕行目标车速,得到了满足冲击度要求、相对于目标车速无超调且起步时间最优的蠕行起步控制策略;以实际车速与目标车速偏差极小为控制目标,通过PID调节离合器压紧力使车辆蠕行过程中能保持车速稳定;制订了车辆蠕行控制策略,避免蠕行过程中离合器烧蚀。

关键词: 车辆传动, 蠕行, 起步, 控制策略

Abstract: To solve the problems of velocity fluctuation and overheat of friction pair during creep, an analysis on friction characteristics of dry friction pair is conducted and the heat safety boundary is determined. A dynamic powertrain system model is established, and a start control strategy is obtained which meets the jerk requirement and have small velocity overshoot compared with target velocity 3km/h by considering variation of friction coefficient when vehicle is starting and in process of creep. Taking the minimum deviation between the actual speed and the target speed as the control objective, the clutch compression force is adjusted by PID to keep the vehicle speed stable during creeping, and the creeping control strategy is formulated to ensure thermo-safety of clutch in creep

Key words: vehicle transmission, creep, start, control strategy